Hey there, Shila!
Coming from a big family myself, I know how expensive a trip to the Most Magical Place on Earth can be, even if you are just visiting for the day.
In my experience, I have not found anywhere cheaper to purchase
one-day theme park tickets than directly on the Walt Disney World Resort website. While discounted group tickets are sometimes available, they are not generally offered for a group of your size.
I find that I can save a little money by purchasing
Disney Gift Cards at my local stores or supermarkets and using those gift cards to purchase my theme park tickets.
Shila, once you purchase your theme park tickets, make sure that you link them to your
My Disney Experience Account. Once your tickets are linked, you can make your
Disney Park Pass system reservations. These reservations are required for theme park entry and do sell out!
Shila, above all, remember to come back here if we can help you plan your magical day.
See you real soon!
Sarah B.